78417801 has 84 divisors (see below), whose sum is σ = 148857856. Its totient is φ = 40415760.

The previous prime is 78417799. The next prime is 78417803. The reversal of 78417801 is 10871487.

It is an interprime number because it is at equal distance from previous prime (78417799) and next prime (78417803).

It is not a de Polignac number, because 78417801 - 2¹ = 78417799 is a prime.

It is a super-2 number, since 2×78417801² = 12298703027351202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78417803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 617400 + ... + 617526.

Almost surely, 2^78417801 is an apocalyptic number.

It is an amenable number.

78417801 is a deficient number, since it is larger than the sum of its proper divisors (70440055).

78417801 is a wasteful number, since it uses less digits than its factorization.

78417801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 78417801 is about 8855.3826004301. The cubic root of 78417801 is about 428.0273823719.

The spelling of 78417801 in words is "seventy-eight million, four hundred seventeen thousand, eight hundred one".